no additional details were added for this assignment. which type of interest rate tends to change over time…

Brief Explanations:

Variable interest rates are subject to change over time based on market - related factors like economic conditions, central bank policies, etc. Fixed rates remain constant, unstructured is not a standard term for interest rate types in this context, and secured refers to the nature of a loan (backed by collateral) rather than the interest rate type.

Answer:

A. variable